The exact shape of this region varies depending on what kind of camera lens is being simulated, but typically it is a frustum of a rectangular pyramid ( hence the name ).
42.
Along with the rectangular cuboids, any parallelepiped is a cuboid of this type, as is a square frustum ( the shape formed by truncation of the apex of a square pyramid ).
43.
In general most sections are treated as frustums of a cone, paraboloid, or neiloid, where the diameter at each end and the length of each section is determined to calculate volume.
44.
He once exercised this control by lifting into the air an inverted conic frustum-shaped land mass whose uppermost area was across, and causing it to fly as though it were a blimp.
45.
It subsequently acquired ACT Group Plc of the U . K . in 1995, and Summit Systems Inc . and Frustum Group Inc ., both of the U . S ., last year.
46.
Alternatively, it can be constructed by gluing together two end-to-end pentagonal frustums, or ( if coplanar faces are allowed ) by gluing together two pentagonal prisms on their pentagonal faces.
47.
Support mappings require only a single mathematical function to represent a point, line segment, disc, cylinder, cone, ellipsoid, football, bullet, frustum or most any other common convex shape.
48.
Synthetic light-field rays are typically rendered as part of a hogel ( 2D array of rays / RGB pixels ) using double-frustum rasterization or ray-tracing / ray-casting algorithms.
49.
The "'Qu�bec Pavilion "'at Expo 67 in Montreal was a steel and glass frustum structure built above a body of water between Ontario and France s pavilions on Ile Notre-Dame.
50.
A common technique, reflection mapping, can optionally use existing occlusion estimates from the viewpoint of the main view frustum; or, if performance allows, a new occlusion map can be computed from a separate camera position.
